Side by side

Oak & Oscar The Humboldt GMTvsFormex Reef 39.5 mm

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

The Humboldt GMT
Oak & OscarThe Humboldt GMT
MSRP $2,175
Reef 39.5 mm
FormexReef 39.5 mm
MSRP $2,230

At a glance

15 of 29 specs differ
Diameter
The Humboldt GMT39.5mm
Reef 39.5 mm39.5mm
Power Reserve
The Humboldt GMT56 hoursh
Reef 39.5 mm56h
Water Resistance
The Humboldt GMT200m
Reef 39.5 mm300m
MSRP
The Humboldt GMT$2,175
Reef 39.5 mm$2,230

Full specifications

Case

8 specs
Category
GMT
Diver
Thickness
12.5mm
11mm
Lug-to-Lug
46.8mm
45.5mm
Lug Width
20mm
22mm
Material
316L Stainless Steel
Stainless Steel
Finish
Brushed
Brushed and polished
Water Resistance
200m
300m
Caseback
Solid screw-down
Solid

Crystal & Dial

3 specs
Crystal Shape
Double-domed
Flat
AR Coating
Underside
Inner
Dial Color
White
Bahama Blue

Movement

3 specs
Caliber
Sellita SW330
Sellita SW300-1
Beat Rate
4 vph
28,800 vph
Power Reserve
56 hoursh
56h

Pricing

1 specs
MSRP
$2,175
$2,230

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Oak & Oscar The Humboldt GMT

Oak & Oscar The Humboldt GMT owners widely praise its exceptional accuracy, often running at or near 0 seconds per day, and its comfortable wearability with subtle design details. The construction quality for the price point, sandwich lume, and anti-magnetic properties are also highlighted. Some owners find the bracelet sizing adjustment slightly awkward, and one noted the lume could be brighter. Overall, owners rate the Oak & Oscar The Humboldt GMT highly for its accuracy and comfortable wearability.

Formex Reef 39.5 mm

The Formex Reef 39.5 mm is widely praised for its refined finishing, comfortable and well-proportioned case design, and impressive specifications for its price point, including COSC-certified Sellita SW300-1 movement and 300m water resistance. Owners and reviewers highlight the tool-less micro-adjust clasp and quick-release spring bars as practical features. Some reviewers note that the 22mm lug width feels slightly disproportionate to the smaller case, and the bracelet could benefit from more taper, though this is a point of contention for some owners who value the overall package. A prototype crown protrusion issue is noted as being addressed for production. On balance, owners and reviewers rate the Formex Reef 39.5 mm highly for its excellent value and well-executed design.

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